Added 9 October 2026 assertible adjective Categories: Obscure Words adjective ! Definition from Wiktionary (CC BY-SA). More about assertible at Wordnik → Where our words come from → Alternative form of assertable. noun Alternative form of assertable. Related Words: assertableproveablestateablephraseableallegeableclassiblereferableprojectiblemanifestiblesubstantiatableassessiblearbitratable Back to today's word